<?php

namespace PHPExcel\Helper;

/**
 * PHPExcel_Helper_HTML
 *
 * Copyright (c) 2006 - 2015 PHPExcel
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * @category PHPExcel
 * @package PHPExcel
 * @copyright Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
 * @version ##VERSION##, ##DATE##
 */
class HTML {
    protected static $colourMap = [
    'aliceblue' => 'f0f8ff',
    'antiquewhite' => 'faebd7',
    'antiquewhite1' => 'ffefdb',
    'antiquewhite2' => 'eedfcc',
    'antiquewhite3' => 'cdc0b0',
    'antiquewhite4' => '8b8378',
    'aqua' => '00ffff',
    'aquamarine1' => '7fffd4',
    'aquamarine2' => '76eec6',
    'aquamarine4' => '458b74',
    'azure1' => 'f0ffff',
    'azure2' => 'e0eeee',
    'azure3' => 'c1cdcd',
    'azure4' => '838b8b',
    'beige' => 'f5f5dc',
    'bisque1' => 'ffe4c4',
    'bisque2' => 'eed5b7',
    'bisque3' => 'cdb79e',
    'bisque4' => '8b7d6b',
    'black' => '000000',
    'blanchedalmond' => 'ffebcd',
    'blue' => '0000ff',
    'blue1' => '0000ff',
    'blue2' => '0000ee',
    'blue4' => '00008b',
    'blueviolet' => '8a2be2',
    'brown' => 'a52a2a',
    'brown1' => 'ff4040',
    'brown2' => 'ee3b3b',
    'brown3' => 'cd3333',
    'brown4' => '8b2323',
    'burlywood' => 'deb887',
    'burlywood1' => 'ffd39b',
    'burlywood2' => 'eec591',
    'burlywood3' => 'cdaa7d',
    'burlywood4' => '8b7355',
    'cadetblue' => '5f9ea0',
    'cadetblue1' => '98f5ff',
    'cadetblue2' => '8ee5ee',
    'cadetblue3' => '7ac5cd',
    'cadetblue4' => '53868b',
    'chartreuse1' => '7fff00',
    'chartreuse2' => '76ee00',
    'chartreuse3' => '66cd00',
    'chartreuse4' => '458b00',
    'chocolate' => 'd2691e',
    'chocolate1' => 'ff7f24',
    'chocolate2' => 'ee7621',
    'chocolate3' => 'cd661d',
    'coral' => 'ff7f50',
    'coral1' => 'ff7256',
    'coral2' => 'ee6a50',
    'coral3' => 'cd5b45',
    'coral4' => '8b3e2f',
    'cornflowerblue' => '6495ed',
    'cornsilk1' => 'fff8dc',
    'cornsilk2' => 'eee8cd',
    'cornsilk3' => 'cdc8b1',
    'cornsilk4' => '8b8878',
    'cyan1' => '00ffff',
    'cyan2' => '00eeee',
    'cyan3' => '00cdcd',
    'cyan4' => '008b8b',
    'darkgoldenrod' => 'b8860b',
    'darkgoldenrod1' => 'ffb90f',
    'darkgoldenrod2' => 'eead0e',
    'darkgoldenrod3' => 'cd950c',
    'darkgoldenrod4' => '8b6508',
    'darkgreen' => '006400',
    'darkkhaki' => 'bdb76b',
    'darkolivegreen' => '556b2f',
    'darkolivegreen1' => 'caff70',
    'darkolivegreen2' => 'bcee68',
    'darkolivegreen3' => 'a2cd5a',
    'darkolivegreen4' => '6e8b3d',
    'darkorange' => 'ff8c00',
    'darkorange1' => 'ff7f00',
    'darkorange2' => 'ee7600',
    'darkorange3' => 'cd6600',
    'darkorange4' => '8b4500',
    'darkorchid' => '9932cc',
    'darkorchid1' => 'bf3eff',
    'darkorchid2' => 'b23aee',
    'darkorchid3' => '9a32cd',
    'darkorchid4' => '68228b',
    'darksalmon' => 'e9967a',
    'darkseagreen' => '8fbc8f',
    'darkseagreen1' => 'c1ffc1',
    'darkseagreen2' => 'b4eeb4',
    'darkseagreen3' => '9bcd9b',
    'darkseagreen4' => '698b69',
    'darkslateblue' => '483d8b',
    'darkslategray' => '2f4f4f',
    'darkslategray1' => '97ffff',
    'darkslategray2' => '8deeee',
    'darkslategray3' => '79cdcd',
    'darkslategray4' => '528b8b',
    'darkturquoise' => '00ced1',
    'darkviolet' => '9400d3',
    'deeppink1' => 'ff1493',
    'deeppink2' => 'ee1289',
    'deeppink3' => 'cd1076',
    'deeppink4' => '8b0a50',
    'deepskyblue1' => '00bfff',
    'deepskyblue2' => '00b2ee',
    'deepskyblue3' => '009acd',
    'deepskyblue4' => '00688b',
    'dimgray' => '696969',
    'dodgerblue1' => '1e90ff',
    'dodgerblue2' => '1c86ee',
    'dodgerblue3' => '1874cd',
    'dodgerblue4' => '104e8b',
    'firebrick' => 'b22222',
    'firebrick1' => 'ff3030',
    'firebrick2' => 'ee2c2c',
    'firebrick3' => 'cd2626',
    'firebrick4' => '8b1a1a',
    'floralwhite' => 'fffaf0',
    'forestgreen' => '228b22',
    'fuchsia' => 'ff00ff',
    'gainsboro' => 'dcdcdc',
    'ghostwhite' => 'f8f8ff',
    'gold1' => 'ffd700',
    'gold2' => 'eec900',
    'gold3' => 'cdad00',
    'gold4' => '8b7500',
    'goldenrod' => 'daa520',
    'goldenrod1' => 'ffc125',
    'goldenrod2' => 'eeb422',
    'goldenrod3' => 'cd9b1d',
    'goldenrod4' => '8b6914',
    'gray' => 'bebebe',
    'gray1' => '030303',
    'gray10' => '1a1a1a',
    'gray11' => '1c1c1c',
    'gray12' => '1f1f1f',
    'gray13' => '212121',
    'gray14' => '242424',
    'gray15' => '262626',
    'gray16' => '292929',
    'gray17' => '2b2b2b',
    'gray18' => '2e2e2e',
    'gray19' => '303030',
    'gray2' => '050505',
    'gray20' => '333333',
    'gray21' => '363636',
    'gray22' => '383838',
    'gray23' => '3b3b3b',
    'gray24' => '3d3d3d',
    'gray25' => '404040',
    'gray26' => '424242',
    'gray27' => '454545',
    'gray28' => '474747',
    'gray29' => '4a4a4a',
    'gray3' => '080808',
    'gray30' => '4d4d4d',
    'gray31' => '4f4f4f',
    'gray32' => '525252',
    'gray33' => '545454',
    'gray34' => '575757',
    'gray35' => '595959',
    'gray36' => '5c5c5c',
    'gray37' => '5e5e5e',
    'gray38' => '616161',
    'gray39' => '636363',
    'gray4' => '0a0a0a',
    'gray40' => '666666',
    'gray41' => '696969',
    'gray42' => '6b6b6b',
    'gray43' => '6e6e6e',
    'gray44' => '707070',
    'gray45' => '737373',
    'gray46' => '757575',
    'gray47' => '787878',
    'gray48' => '7a7a7a',
    'gray49' => '7d7d7d',
    'gray5' => '0d0d0d',
    'gray50' => '7f7f7f',
    'gray51' => '828282',
    'gray52' => '858585',
    'gray53' => '878787',
    'gray54' => '8a8a8a',
    'gray55' => '8c8c8c',
    'gray56' => '8f8f8f',
    'gray57' => '919191',
    'gray58' => '949494',
    'gray59' => '969696',
    'gray6' => '0f0f0f',
    'gray60' => '999999',
    'gray61' => '9c9c9c',
    'gray62' => '9e9e9e',
    'gray63' => 'a1a1a1',
    'gray64' => 'a3a3a3',
    'gray65' => 'a6a6a6',
    'gray66' => 'a8a8a8',
    'gray67' => 'ababab',
    'gray68' => 'adadad',
    'gray69' => 'b0b0b0',
    'gray7' => '121212',
    'gray70' => 'b3b3b3',
    'gray71' => 'b5b5b5',
    'gray72' => 'b8b8b8',
    'gray73' => 'bababa',
    'gray74' => 'bdbdbd',
    'gray75' => 'bfbfbf',
    'gray76' => 'c2c2c2',
    'gray77' => 'c4c4c4',
    'gray78' => 'c7c7c7',
    'gray79' => 'c9c9c9',
    'gray8' => '141414',
    'gray80' => 'cccccc',
    'gray81' => 'cfcfcf',
    'gray82' => 'd1d1d1',
    'gray83' => 'd4d4d4',
    'gray84' => 'd6d6d6',
    'gray85' => 'd9d9d9',
    'gray86' => 'dbdbdb',
    'gray87' => 'dedede',
    'gray88' => 'e0e0e0',
    'gray89' => 'e3e3e3',
    'gray9' => '171717',
    'gray90' => 'e5e5e5',
    'gray91' => 'e8e8e8',
    'gray92' => 'ebebeb',
    'gray93' => 'ededed',
    'gray94' => 'f0f0f0',
    'gray95' => 'f2f2f2',
    'gray97' => 'f7f7f7',
    'gray98' => 'fafafa',
    'gray99' => 'fcfcfc',
    'green' => '00ff00',
    'green1' => '00ff00',
    'green2' => '00ee00',
    'green3' => '00cd00',
    'green4' => '008b00',
    'greenyellow' => 'adff2f',
    'honeydew1' => 'f0fff0',
    'honeydew2' => 'e0eee0',
    'honeydew3' => 'c1cdc1',
    'honeydew4' => '838b83',
    'hotpink' => 'ff69b4',
    'hotpink1' => 'ff6eb4',
    'hotpink2' => 'ee6aa7',
    'hotpink3' => 'cd6090',
    'hotpink4' => '8b3a62',
    'indianred' => 'cd5c5c',
    'indianred1' => 'ff6a6a',
    'indianred2' => 'ee6363',
    'indianred3' => 'cd5555',
    'indianred4' => '8b3a3a',
    'ivory1' => 'fffff0',
    'ivory2' => 'eeeee0',
    'ivory3' => 'cdcdc1',
    'ivory4' => '8b8b83',
    'khaki' => 'f0e68c',
    'khaki1' => 'fff68f',
    'khaki2' => 'eee685',
    'khaki3' => 'cdc673',
    'khaki4' => '8b864e',
    'lavender' => 'e6e6fa',
    'lavenderblush1' => 'fff0f5',
    'lavenderblush2' => 'eee0e5',
    'lavenderblush3' => 'cdc1c5',
    'lavenderblush4' => '8b8386',
    'lawngreen' => '7cfc00',
    'lemonchiffon1' => 'fffacd',
    'lemonchiffon2' => 'eee9bf',
    'lemonchiffon3' => 'cdc9a5',
    'lemonchiffon4' => '8b8970',
    'light' => 'eedd82',
    'lightblue' => 'add8e6',
    'lightblue1' => 'bfefff',
    'lightblue2' => 'b2dfee',
    'lightblue3' => '9ac0cd',
    'lightblue4' => '68838b',
    'lightcoral' => 'f08080',
    'lightcyan1' => 'e0ffff',
    'lightcyan2' => 'd1eeee',
    'lightcyan3' => 'b4cdcd',
    'lightcyan4' => '7a8b8b',
    'lightgoldenrod1' => 'ffec8b',
    'lightgoldenrod2' => 'eedc82',
    'lightgoldenrod3' => 'cdbe70',
    'lightgoldenrod4' => '8b814c',
    'lightgoldenrodyellow' => 'fafad2',
    'lightgray' => 'd3d3d3',
    'lightpink' => 'ffb6c1',
    'lightpink1' => 'ffaeb9',
    'lightpink2' => 'eea2ad',
    'lightpink3' => 'cd8c95',
    'lightpink4' => '8b5f65',
    'lightsalmon1' => 'ffa07a',
    'lightsalmon2' => 'ee9572',
    'lightsalmon3' => 'cd8162',
    'lightsalmon4' => '8b5742',
    'lightseagreen' => '20b2aa',
    'lightskyblue' => '87cefa',
    'lightskyblue1' => 'b0e2ff',
    'lightskyblue2' => 'a4d3ee',
    'lightskyblue3' => '8db6cd',
    'lightskyblue4' => '607b8b',
    'lightslateblue' => '8470ff',
    'lightslategray' => '778899',
    'lightsteelblue' => 'b0c4de',
    'lightsteelblue1' => 'cae1ff',
    'lightsteelblue2' => 'bcd2ee',
    'lightsteelblue3' => 'a2b5cd',
    'lightsteelblue4' => '6e7b8b',
    'lightyellow1' => 'ffffe0',
    'lightyellow2' => 'eeeed1',
    'lightyellow3' => 'cdcdb4',
    'lightyellow4' => '8b8b7a',
    'lime' => '00ff00',
    'limegreen' => '32cd32',
    'linen' => 'faf0e6',
    'magenta' => 'ff00ff',
    'magenta2' => 'ee00ee',
    'magenta3' => 'cd00cd',
    'magenta4' => '8b008b',
    'maroon' => 'b03060',
    'maroon1' => 'ff34b3',
    'maroon2' => 'ee30a7',
    'maroon3' => 'cd2990',
    'maroon4' => '8b1c62',
    'medium' => '66cdaa',
    'mediumaquamarine' => '66cdaa',
    'mediumblue' => '0000cd',
    'mediumorchid' => 'ba55d3',
    'mediumorchid1' => 'e066ff',
    'mediumorchid2' => 'd15fee',
    'mediumorchid3' => 'b452cd',
    'mediumorchid4' => '7a378b',
    'mediumpurple' => '9370db',
    'mediumpurple1' => 'ab82ff',
    'mediumpurple2' => '9f79ee',
    'mediumpurple3' => '8968cd',
    'mediumpurple4' => '5d478b',
    'mediumseagreen' => '3cb371',
    'mediumslateblue' => '7b68ee',
    'mediumspringgreen' => '00fa9a',
    'mediumturquoise' => '48d1cc',
    'mediumvioletred' => 'c71585',
    'midnightblue' => '191970',
    'mintcream' => 'f5fffa',
    'mistyrose1' => 'ffe4e1',
    'mistyrose2' => 'eed5d2',
    'mistyrose3' => 'cdb7b5',
    'mistyrose4' => '8b7d7b',
    'moccasin' => 'ffe4b5',
    'navajowhite1' => 'ffdead',
    'navajowhite2' => 'eecfa1',
    'navajowhite3' => 'cdb38b',
    'navajowhite4' => '8b795e',
    'navy' => '000080',
    'navyblue' => '000080',
    'oldlace' => 'fdf5e6',
    'olive' => '808000',
    'olivedrab' => '6b8e23',
    'olivedrab1' => 'c0ff3e',
    'olivedrab2' => 'b3ee3a',
    'olivedrab4' => '698b22',
    'orange' => 'ffa500',
    'orange1' => 'ffa500',
    'orange2' => 'ee9a00',
    'orange3' => 'cd8500',
    'orange4' => '8b5a00',
    'orangered1' => 'ff4500',
    'orangered2' => 'ee4000',
    'orangered3' => 'cd3700',
    'orangered4' => '8b2500',
    'orchid' => 'da70d6',
    'orchid1' => 'ff83fa',
    'orchid2' => 'ee7ae9',
    'orchid3' => 'cd69c9',
    'orchid4' => '8b4789',
    'pale' => 'db7093',
    'palegoldenrod' => 'eee8aa',
    'palegreen' => '98fb98',
    'palegreen1' => '9aff9a',
    'palegreen2' => '90ee90',
    'palegreen3' => '7ccd7c',
    'palegreen4' => '548b54',
    'paleturquoise' => 'afeeee',
    'paleturquoise1' => 'bbffff',
    'paleturquoise2' => 'aeeeee',
    'paleturquoise3' => '96cdcd',
    'paleturquoise4' => '668b8b',
    'palevioletred' => 'db7093',
    'palevioletred1' => 'ff82ab',
    'palevioletred2' => 'ee799f',
    'palevioletred3' => 'cd6889',
    'palevioletred4' => '8b475d',
    'papayawhip' => 'ffefd5',
    'peachpuff1' => 'ffdab9',
    'peachpuff2' => 'eecbad',
    'peachpuff3' => 'cdaf95',
    'peachpuff4' => '8b7765',
    'pink' => 'ffc0cb',
    'pink1' => 'ffb5c5',
    'pink2' => 'eea9b8',
    'pink3' => 'cd919e',
    'pink4' => '8b636c',
    'plum' => 'dda0dd',
    'plum1' => 'ffbbff',
    'plum2' => 'eeaeee',
    'plum3' => 'cd96cd',
    'plum4' => '8b668b',
    'powderblue' => 'b0e0e6',
    'purple' => 'a020f0',
    'rebeccapurple' => '663399',
    'purple1' => '9b30ff',
    'purple2' => '912cee',
    'purple3' => '7d26cd',
    'purple4' => '551a8b',
    'red' => 'ff0000',
    'red1' => 'ff0000',
    'red2' => 'ee0000',
    'red3' => 'cd0000',
    'red4' => '8b0000',
    'rosybrown' => 'bc8f8f',
    'rosybrown1' => 'ffc1c1',
    'rosybrown2' => 'eeb4b4',
    'rosybrown3' => 'cd9b9b',
    'rosybrown4' => '8b6969',
    'royalblue' => '4169e1',
    'royalblue1' => '4876ff',
    'royalblue2' => '436eee',
    'royalblue3' => '3a5fcd',
    'royalblue4' => '27408b',
    'saddlebrown' => '8b4513',
    'salmon' => 'fa8072',
    'salmon1' => 'ff8c69',
    'salmon2' => 'ee8262',
    'salmon3' => 'cd7054',
    'salmon4' => '8b4c39',
    'sandybrown' => 'f4a460',
    'seagreen1' => '54ff9f',
    'seagreen2' => '4eee94',
    'seagreen3' => '43cd80',
    'seagreen4' => '2e8b57',
    'seashell1' => 'fff5ee',
    'seashell2' => 'eee5de',
    'seashell3' => 'cdc5bf',
    'seashell4' => '8b8682',
    'sienna' => 'a0522d',
    'sienna1' => 'ff8247',
    'sienna2' => 'ee7942',
    'sienna3' => 'cd6839',
    'sienna4' => '8b4726',
    'silver' => 'c0c0c0',
    'skyblue' => '87ceeb',
    'skyblue1' => '87ceff',
    'skyblue2' => '7ec0ee',
    'skyblue3' => '6ca6cd',
    'skyblue4' => '4a708b',
    'slateblue' => '6a5acd',
    'slateblue1' => '836fff',
    'slateblue2' => '7a67ee',
    'slateblue3' => '6959cd',
    'slateblue4' => '473c8b',
    'slategray' => '708090',
    'slategray1' => 'c6e2ff',
    'slategray2' => 'b9d3ee',
    'slategray3' => '9fb6cd',
    'slategray4' => '6c7b8b',
    'snow1' => 'fffafa',
    'snow2' => 'eee9e9',
    'snow3' => 'cdc9c9',
    'snow4' => '8b8989',
    'springgreen1' => '00ff7f',
    'springgreen2' => '00ee76',
    'springgreen3' => '00cd66',
    'springgreen4' => '008b45',
    'steelblue' => '4682b4',
    'steelblue1' => '63b8ff',
    'steelblue2' => '5cacee',
    'steelblue3' => '4f94cd',
    'steelblue4' => '36648b',
    'tan' => 'd2b48c',
    'tan1' => 'ffa54f',
    'tan2' => 'ee9a49',
    'tan3' => 'cd853f',
    'tan4' => '8b5a2b',
    'teal' => '008080',
    'thistle' => 'd8bfd8',
    'thistle1' => 'ffe1ff',
    'thistle2' => 'eed2ee',
    'thistle3' => 'cdb5cd',
    'thistle4' => '8b7b8b',
    'tomato1' => 'ff6347',
    'tomato2' => 'ee5c42',
    'tomato3' => 'cd4f39',
    'tomato4' => '8b3626',
    'turquoise' => '40e0d0',
    'turquoise1' => '00f5ff',
    'turquoise2' => '00e5ee',
    'turquoise3' => '00c5cd',
    'turquoise4' => '00868b',
    'violet' => 'ee82ee',
    'violetred' => 'd02090',
    'violetred1' => 'ff3e96',
    'violetred2' => 'ee3a8c',
    'violetred3' => 'cd3278',
    'violetred4' => '8b2252',
    'wheat' => 'f5deb3',
    'wheat1' => 'ffe7ba',
    'wheat2' => 'eed8ae',
    'wheat3' => 'cdba96',
    'wheat4' => '8b7e66',
    'white' => 'ffffff',
    'whitesmoke' => 'f5f5f5',
    'yellow' => 'ffff00',
    'yellow1' => 'ffff00',
    'yellow2' => 'eeee00',
    'yellow3' => 'cdcd00',
    'yellow4' => '8b8b00',
    'yellowgreen' => '9acd32' 
    ];
    protected $face;
    protected $size;
    protected $color;
    protected $bold = false;
    protected $italic = false;
    protected $underline = false;
    protected $superscript = false;
    protected $subscript = false;
    protected $strikethrough = false;
    protected $startTagCallbacks = array(
    'font' => 'startFontTag',
    'b' => 'startBoldTag',
    'strong' => 'startBoldTag',
    'i' => 'startItalicTag',
    'em' => 'startItalicTag',
    'u' => 'startUnderlineTag',
    'ins' => 'startUnderlineTag',
    'del' => 'startStrikethruTag',
    'sup' => 'startSuperscriptTag',
    'sub' => 'startSubscriptTag' 
    );
    protected $endTagCallbacks = array(
    'font' => 'endFontTag',
    'b' => 'endBoldTag',
    'strong' => 'endBoldTag',
    'i' => 'endItalicTag',
    'em' => 'endItalicTag',
    'u' => 'endUnderlineTag',
    'ins' => 'endUnderlineTag',
    'del' => 'endStrikethruTag',
    'sup' => 'endSuperscriptTag',
    'sub' => 'endSubscriptTag',
    'br' => 'breakTag',
    'p' => 'breakTag',
    'h1' => 'breakTag',
    'h2' => 'breakTag',
    'h3' => 'breakTag',
    'h4' => 'breakTag',
    'h5' => 'breakTag',
    'h6' => 'breakTag' 
    );
    protected $stack = array();
    protected $stringData = '';
    protected $richTextObject;
    protected function initialise() {
        $this->face = $this->size = $this->color = null;
        $this->bold = $this->italic = $this->underline = $this->superscript = $this->subscript = $this->strikethrough = false;
        
        $this->stack = array();
        
        $this->stringData = '';
    }
    public function toRichTextObject($html) {
        $this->initialise();
        
        // Create a new DOM object
        $dom = new \DOMDocument();
        // Load the HTML file into the DOM object
        // Note the use of error suppression, because typically this will be an html fragment, so not fully valid markup
        $loaded = @$dom->loadHTML($html);
        
        // Discard excess white space
        $dom->preserveWhiteSpace = false;
        
        $this->richTextObject = new \PHPExcel\RichText();
        $this->parseElements($dom);
        
        // Clean any further spurious whitespace
        $this->cleanWhitespace();
        
        return $this->richTextObject;
    }
    protected function cleanWhitespace() {
        foreach ( $this->richTextObject->getRichTextElements() as $key => $element ) {
            $text = $element->getText();
            // Trim any leading spaces on the first run
            if ($key == 0) {
                $text = ltrim($text);
            }
            // Trim any spaces immediately after a line break
            $text = preg_replace('/\n */mu', "\n", $text);
            $element->setText($text);
        }
    }
    protected function buildTextRun() {
        $text = $this->stringData;
        if (trim($text) === '') {
            return;
        }
        
        $richtextRun = $this->richTextObject->createTextRun($this->stringData);
        if ($this->face) {
            $richtextRun->getFont()->setName($this->face);
        }
        if ($this->size) {
            $richtextRun->getFont()->setSize($this->size);
        }
        if ($this->color) {
            $richtextRun->getFont()->setColor(new \PHPExcel\Style\Color('ff' . $this->color));
        }
        if ($this->bold) {
            $richtextRun->getFont()->setBold(true);
        }
        if ($this->italic) {
            $richtextRun->getFont()->setItalic(true);
        }
        if ($this->underline) {
            $richtextRun->getFont()->setUnderline(\PHPExcel\Style\Font::UNDERLINE_SINGLE);
        }
        if ($this->superscript) {
            $richtextRun->getFont()->setSuperScript(true);
        }
        if ($this->subscript) {
            $richtextRun->getFont()->setSubScript(true);
        }
        if ($this->strikethrough) {
            $richtextRun->getFont()->setStrikethrough(true);
        }
        $this->stringData = '';
    }
    protected function rgbToColour($rgb) {
        preg_match_all('/\d+/', $rgb, $values);
        foreach ( $values[0] as &$value ) {
            $value = str_pad(dechex($value), 2, '0', STR_PAD_LEFT);
        }
        return implode($values[0]);
    }
    protected function colourNameLookup($rgb) {
        return self::$colourMap[$rgb];
    }
    protected function startFontTag($tag) {
        foreach ( $tag->attributes as $attribute ) {
            $attributeName = strtolower($attribute->name);
            $attributeValue = $attribute->value;
            
            if ($attributeName == 'color') {
                if (preg_match('/rgb\s*\(/', $attributeValue)) {
                    $this->$attributeName = $this->rgbToColour($attributeValue);
                } elseif (strpos(trim($attributeValue), '#') === 0) {
                    $this->$attributeName = ltrim($attributeValue, '#');
                } else {
                    $this->$attributeName = $this->colourNameLookup($attributeValue);
                }
            } else {
                $this->$attributeName = $attributeValue;
            }
        }
    }
    protected function endFontTag() {
        $this->face = $this->size = $this->color = null;
    }
    protected function startBoldTag() {
        $this->bold = true;
    }
    protected function endBoldTag() {
        $this->bold = false;
    }
    protected function startItalicTag() {
        $this->italic = true;
    }
    protected function endItalicTag() {
        $this->italic = false;
    }
    protected function startUnderlineTag() {
        $this->underline = true;
    }
    protected function endUnderlineTag() {
        $this->underline = false;
    }
    protected function startSubscriptTag() {
        $this->subscript = true;
    }
    protected function endSubscriptTag() {
        $this->subscript = false;
    }
    protected function startSuperscriptTag() {
        $this->superscript = true;
    }
    protected function endSuperscriptTag() {
        $this->superscript = false;
    }
    protected function startStrikethruTag() {
        $this->strikethrough = true;
    }
    protected function endStrikethruTag() {
        $this->strikethrough = false;
    }
    protected function breakTag() {
        $this->stringData .= "\n";
    }
    protected function parseTextNode(\DOMText $textNode) {
        $domText = preg_replace('/\s+/u', ' ', str_replace([
        "\r",
        "\n" 
        ], ' ', $textNode->nodeValue));
        $this->stringData .= $domText;
        $this->buildTextRun();
    }
    protected function handleCallback($element, $callbackTag, $callbacks) {
        if (isset($callbacks[$callbackTag])) {
            $elementHandler = $callbacks[$callbackTag];
            if (method_exists($this, $elementHandler)) {
                call_user_func(array(
                $this,
                $elementHandler 
                ), $element);
            }
        }
    }
    protected function parseElementNode(\DOMElement $element) {
        $callbackTag = strtolower($element->nodeName);
        $this->stack[] = $callbackTag;
        
        $this->handleCallback($element, $callbackTag, $this->startTagCallbacks);
        
        $this->parseElements($element);
        array_pop($this->stack);
        
        $this->handleCallback($element, $callbackTag, $this->endTagCallbacks);
    }
    protected function parseElements(\DOMNode $element) {
        foreach ( $element->childNodes as $child ) {
            if ($child instanceof \DOMText) {
                $this->parseTextNode($child);
            } elseif ($child instanceof \DOMElement) {
                $this->parseElementNode($child);
            }
        }
    }
}
